Lightning deals run for a fixed window and end when the timer does or the stock runs out, whichever comes first. The countdown on each listing is read from the actual expiry time recorded when the deal was posted. When there is no real expiry, no timer is shown.
₹464 — was ₹2,199, 79% off
₹138 — was ₹599, 77% off
₹284 — was ₹1,299, 78% off
₹237 — was ₹1,109, 79% off
₹479 — was ₹2,997, 84% off
₹1,519 — was ₹8,999, 83% off
₹480 — was ₹2,599, 82% off
₹398 — was ₹1,999, 80% off
₹460 — was ₹2,000, 77% off
₹5,099 — was ₹30,420, 83% off
₹474 — was ₹1,999, 76% off
₹569 — was ₹2,999, 81% off
Yes. It counts down to the expiry time stored with the deal. Listings without a known expiry show no timer at all rather than a fake one.
The page stays up and gets marked expired instead of being deleted. The buy button switches off and the listing shows what the price was, so you can tell an ended deal from a live one rather than landing on a broken link.